Accumulated Other Comprehensive Income (Loss) (Changes in AOCI Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	$ (98,197)	$ (40,300)
Other comprehensive income (loss) before reclassifications	(16,610)	(61,117)
Amounts reclassified from AOCI	8,877	3,220
Total other comprehensive (loss) income	(7,733)	(57,897)	$ 26,901
Accumulated Other Comprehensive Loss, Ending balance	(105,930)	(98,197)	(40,300)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(2,905)	(1,584)
Other comprehensive income (loss) before reclassifications	(4,295)	(1,321)
Amounts reclassified from AOCI	0	0
Total other comprehensive (loss) income	(4,295)	(1,321)
Accumulated Other Comprehensive Loss, Ending balance	(7,200)	(2,905)	(1,584)
Pension and Other Postretirement Benefits [Member]
Accumulated Other Comprehensive Income Loss [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(95,292)	(38,716)
Other comprehensive income (loss) before reclassifications	(12,315)	(59,796)
Amounts reclassified from AOCI	8,877	3,220
Total other comprehensive (loss) income	(3,438)	(56,576)
Accumulated Other Comprehensive Loss, Ending balance	$ (98,730)	$ (95,292)	$ (38,716)